Good Evening
I struggle with the setup of macvlans for Docker on Debian 12.
In my environment I don’t get to the point, where Docker containers can be
reached over a macvlan.
How the network settings looks like:
PROMISC is enabled on the interface:
2: eno1: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc fq_codel
state UP group default qlen 1000
link/ether 94:c6:91:18:80:59 brd ff:ff:ff:ff:ff:ff
altname enp0s31f6
inet 172.16.100.66/24 brd 172.16.100.255 scope global eno1
valid_lft forever preferred_lft forever
inet6 fe80::96c6:91ff:fe18:8059/64 scope link
valid_lft forever preferred_lft forever
14: dm-f895f9b34c30: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UNKNOWN group default
link/ether a2:48:31:08:d4:67 brd ff:ff:ff:ff:ff:ff
inet6 fe80::b8b7:97ff:fec3:51fa/64 scope link
valid_lft forever preferred_lft forever
docker network ls
NETWORK ID NAME DRIVER SCOPE
e1b6a1556220 bridge bridge local
f895f9b34c30 dockermacvlan macvlan local
de93e5b98755 host host local
7151075f2888 none null local
dm-f895f9b34c30: flags=195<UP,BROADCAST,RUNNING,NOARP> mtu 1500
inet6 fe80::b8b7:97ff:fec3:51fa prefixlen 64 scopeid 0x20<link>
ether a2:48:31:08:d4:67 txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 11 bytes 686 (686.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:80:0d:e0:d6 txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno1: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST> mtu 1500
inet 172.16.100.66 netmask 255.255.255.0 broadcast 172.16.100.255
inet6 fe80::96c6:91ff:fe18:8059 prefixlen 64 scopeid 0x20<link>
ether 94:c6:91:18:80:59 txqueuelen 1000 (Ethernet)
RX packets 21706 bytes 12834211 (12.2 MiB)
RX errors 0 dropped 148 overruns 0 frame 0
TX packets 9460 bytes 1227650 (1.1 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 16 memory 0xdc200000-dc220000
docker exec busybox1 ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
15: eth0@if14: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue
link/ether 02:42:ac:10:64:e0 brd ff:ff:ff:ff:ff:ff
inet 172.16.100.224/24 brd 172.16.100.255 scope global eth0
valid_lft forever preferred_lft forever
How I did the the docker macvlan:
docker network create -d macvlan \
--subnet 172.16.100.0/24 \
--gateway 172.16.100.3 \
-o parnet=eno1 \
dockermacvlan
Also not working:
docker network create -d macvlan \
--subnet 172.16.100.0/24 \
--gateway 172.16.100.3 \
-o parnet=eth0 \
dockermacvlan
How I created the container:
docker run -itd --rm --name busybox1 \
--network dockermacvlan \
--ip 172.16.100.224 \
busybox
How the container env looks like:
docker exec busybox1 ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
15: eth0@if14: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue
link/ether 02:42:ac:10:64:e0 brd ff:ff:ff:ff:ff:ff
inet 172.16.100.224/24 brd 172.16.100.255 scope global eth0
valid_lft forever preferred_lft forever
I cannot ping from 172.16.100.66 to 172.16.100.224 (busybox1) and vice versa.
sudo tcpdump -nnvi any 'host 172.16.100.224'
tcpdump: data link type LINUX_SLL2
tcpdump: listening on any, link-type LINUX_SLL2 (Linux cooked v2), snapshot
length 262144 bytes
21:10:34.258465 eno1 Out ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
172.16.100.224 tell 172.16.100.66, length 28
21:10:35.268594 eno1 Out ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
172.16.100.224 tell 172.16.100.66, length 28
21:10:36.292600 eno1 Out ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
172.16.100.224 tell 172.16.100.66, length 28
21:10:37.317179 eno1 Out ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
172.16.100.224 tell 172.16.100.66, length 28
21:10:38.340592 eno1 Out ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
172.16.100.224 tell 172.16.100.66, length 28
I would appreciate any hint much, which could help to solve that.
BR,
Josip
